US2745601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key-responsive calculating machine
Assignee: —
•
Filing: —
•
Granted: 1956-05-15
•
Expires: 1973-05-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:10
CPC Classifications
G; G06; G06C; G06C23/00; G06C23/02; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/0202; G06F3/0219
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2210099A
Cited
US2229889A
Cited
US2318241A
Cited
US2386364A
Cited
US2552789A
Cited
US2583377A
Cited
US1136725A
Cited
US2654539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |